Ni2+/Co2+ doped Au-Fe7S8 nanoplatelets with exceptionally high oxygen evolution reaction activity
To overcome the limited potency of energy devices such as alkaline water electrolyzers, the construction of active materials with dramatically enhanced oxygen evolution reaction (OER) performance is of great importance. Herein we developed an ion diffusion-induced doping strategy that is capable of...
| Main Authors: | , , , , , , , , , , |
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| Format: | Journal Article |
| Published: |
2021
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| Online Access: | http://purl.org/au-research/grants/arc/FT210100509 http://hdl.handle.net/20.500.11937/87966 |
| _version_ | 1848764953686704128 |
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| author | Javaid, Shaghraf Xu, Xiaomin Chen, Wei Chen, Jiayi Hsu, H.Y. Wang, S. Yang, X. Li, Y. Shao, Zongping Jones, Franca Jia, Guohua |
| author_facet | Javaid, Shaghraf Xu, Xiaomin Chen, Wei Chen, Jiayi Hsu, H.Y. Wang, S. Yang, X. Li, Y. Shao, Zongping Jones, Franca Jia, Guohua |
| author_sort | Javaid, Shaghraf |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | To overcome the limited potency of energy devices such as alkaline water electrolyzers, the construction of active materials with dramatically enhanced oxygen evolution reaction (OER) performance is of great importance. Herein we developed an ion diffusion-induced doping strategy that is capable of producing Ni2+/Co2+ doped two-dimensional (2D) Au-Fe7S8 nanoplatelets (NPLs) with exceptionally high OER activity outperforming the benchmark RuO2 catalyst. The co-existence of Co and Ni in Au-Fe7S8 NPLs led to the lowest OER overpotential of 243 mV at 10 mA cm-2 and fast kinetics with a Tafel slope of 43 mV dec-1. Density functional theory (DFT) calculations demonstrated that Ni2+/Co2+ doping improves the binding of OOH species on the {001} surfaces of Au-Fe7S8 NPLs and lowers the Gibbs free energy of the OER process, which are beneficial to outstanding OER activity of the nanoplatelets. |
| first_indexed | 2025-11-14T11:27:33Z |
| format | Journal Article |
| id | curtin-20.500.11937-87966 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:27:33Z |
| publishDate | 2021 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-879662023-08-31T03:19:24Z Ni2+/Co2+ doped Au-Fe7S8 nanoplatelets with exceptionally high oxygen evolution reaction activity Javaid, Shaghraf Xu, Xiaomin Chen, Wei Chen, Jiayi Hsu, H.Y. Wang, S. Yang, X. Li, Y. Shao, Zongping Jones, Franca Jia, Guohua To overcome the limited potency of energy devices such as alkaline water electrolyzers, the construction of active materials with dramatically enhanced oxygen evolution reaction (OER) performance is of great importance. Herein we developed an ion diffusion-induced doping strategy that is capable of producing Ni2+/Co2+ doped two-dimensional (2D) Au-Fe7S8 nanoplatelets (NPLs) with exceptionally high OER activity outperforming the benchmark RuO2 catalyst. The co-existence of Co and Ni in Au-Fe7S8 NPLs led to the lowest OER overpotential of 243 mV at 10 mA cm-2 and fast kinetics with a Tafel slope of 43 mV dec-1. Density functional theory (DFT) calculations demonstrated that Ni2+/Co2+ doping improves the binding of OOH species on the {001} surfaces of Au-Fe7S8 NPLs and lowers the Gibbs free energy of the OER process, which are beneficial to outstanding OER activity of the nanoplatelets. 2021 Journal Article http://hdl.handle.net/20.500.11937/87966 10.1016/j.nanoen.2021.106463 http://purl.org/au-research/grants/arc/FT210100509 http://purl.org/au-research/grants/arc/LE120100026 http://creativecommons.org/licenses/by-nc-nd/4.0/ fulltext |
| spellingShingle | Javaid, Shaghraf Xu, Xiaomin Chen, Wei Chen, Jiayi Hsu, H.Y. Wang, S. Yang, X. Li, Y. Shao, Zongping Jones, Franca Jia, Guohua Ni2+/Co2+ doped Au-Fe7S8 nanoplatelets with exceptionally high oxygen evolution reaction activity |
| title | Ni2+/Co2+ doped Au-Fe7S8 nanoplatelets with exceptionally high oxygen evolution reaction activity |
| title_full | Ni2+/Co2+ doped Au-Fe7S8 nanoplatelets with exceptionally high oxygen evolution reaction activity |
| title_fullStr | Ni2+/Co2+ doped Au-Fe7S8 nanoplatelets with exceptionally high oxygen evolution reaction activity |
| title_full_unstemmed | Ni2+/Co2+ doped Au-Fe7S8 nanoplatelets with exceptionally high oxygen evolution reaction activity |
| title_short | Ni2+/Co2+ doped Au-Fe7S8 nanoplatelets with exceptionally high oxygen evolution reaction activity |
| title_sort | ni2+/co2+ doped au-fe7s8 nanoplatelets with exceptionally high oxygen evolution reaction activity |
| url | http://purl.org/au-research/grants/arc/FT210100509 http://purl.org/au-research/grants/arc/FT210100509 http://hdl.handle.net/20.500.11937/87966 |